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2. Radio clock - Wikipedia

   en.wikipedia.org/wiki/Radio_clock

   A modern LF radio-controlled clock. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an "atomic clock", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio transmitter connected to a time standard such as an atomic clock.

3. Junghans Mega - Wikipedia

   en.wikipedia.org/wiki/Junghans_Mega

   In case of reception issues, the synchronization is repeated every hour until 6:00 a.m. [4] This ensures that the time accuracy of Junghans MEGA radio-controlled wristwatches is... 1 second in 1 million years. The movement is a quartz mechanism of the w605 type with a quartz time base of 32 kHz and a light barrier for hand position control.

4. IKEA - Wikipedia

   en.wikipedia.org/wiki/IKEA

   IKEA (/ aɪ ˈ k iː ə / eye-KEE-ə, Swedish:), is a multinational conglomerate founded in Sweden [6] [7] that designs and sells ready-to-assemble furniture, household goods, and various related services.

5. WWVB - Wikipedia

   en.wikipedia.org/wiki/WWVB

   WWVB's Colorado location makes the signal weakest on the U.S. east coast, where urban density also produces considerable interference. In 2009, NIST raised the possibility of adding a second time code transmitter, on the east coast, to improve signal reception there and provide a certain amount of robustness to the overall system should weather or other causes render one transmitter site ...

6. Digital clock - Wikipedia

   en.wikipedia.org/wiki/Digital_clock

   Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time. Most digital clocks display the hour of the day in 24-hour format; in the United States and a few other countries, a commonly used hour sequence option is 12-hour format (with some indication of AM or PM).

7. Flip clock - Wikipedia

   en.wikipedia.org/wiki/Flip_clock

   A flip clock (also known as a "flap clock") is an electromechanical, digital time keeping device with the time indicated by numbers that are sequentially revealed by a split-flap display. The study, collection and repair of flip clocks is termed horopalettology (from horology – the study and measurement of time and palette – and the Italian ...